I've done just that with DC rated 24VDC relays intended for marine and heavy equipment applications. No arcing while disconnecting SQFlexes under load.
On Apr 3, 2014, at 11:06 PM, Allan Sindelar wrote: > Wrenches, > For my own off grid home, I would like to add four 60-cell modules as a > supplemental array, using a Midnite Classic charge controller. I would like > to set up a relay between this array and the controller to allow me to > direct the output to an SQFlex submersible well pump, using a float switch to > send the coil signal. The float switch in my storage tank would send a call > for water to the relay, which would then allow array current to flow to the > pump during daylight hours. Once the tank is full, the relay switches, > allowing array current to flow to the Classic to charge my batteries. I have > 24V battery DC available in the well location as well. > > Would a standard open contact DPDT power relay with a 24V DC coil work here? > The contact terminals are rated for AC, not 125V DC. If I connect the two > sets of contacts in series, that would reduce but not eliminate arcing. Has > anyone tried this? > > This seems like the simplest solution, but I'm open to other suggestions as > well. > Thanks, Allan > -- > Allan Sindelar > [email protected] > NABCEP Certified PV Installation Professional > NABCEP Certified Technical Sales Professional > New Mexico EE98J Journeyman Electrician > Founder (Retired), Positive Energy, Inc. > A Certified B CorporationTM > Santa Fe, New Mexico > 505 780-2738 cell > > _______________________________________________ > List sponsored by Home Power magazine > > List Address: [email protected] > > Change email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out participant bios: > www.members.re-wrenches.org >
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